/*
 * Copyright 2008 Jens Meiss
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.googlecode.hmvc4gwt.framework.client.controller;

import com.google.gwt.user.client.History;
import com.googlecode.hmvc4java.controller.AController;
import com.googlecode.hmvc4java.event.IEvent;

/**
 * A HistoryController is automatically registered (and unregistered) at the
 * History and controls a set of History-Token to navigate to. You can create a
 * lot of HistoryController, every responsible for a special set of Tokens.
 * 
 * @author jens.meiss
 */
public abstract class AControllerHistoryGwt extends AController implements
		IHistroyController {

	public final void handleEvent(IEvent event) {
		handleEventImpl(event);
	}

	public final void init() {

		History.addValueChangeHandler(this);

		initImpl();
	}
	
	public abstract void initImpl();

	public final void terminate() {		
		terminateImpl();
	}

	/**
	 * This method is called after init() an has the same purpose
	 */
	public abstract void terminateImpl();
}
